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        <td width="359" height="40" align="left" class="title_a">&nbsp;&nbsp;<img src="images/arrow_02.jpg" width="4" height="17" align="absmiddle" /> 产品介绍</td>
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            <td height="28">&nbsp;&nbsp;<img src="images/Shopping_ico.jpg" width="16" height="14" align="absmiddle" /> <a href="#">查看购物车 <font color="#FF0000">(5)</font></a>&nbsp;&nbsp;</td>
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            <td height="50" align="left"><strong>产 品 名 称：</strong> 预付费电能表</td>
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            <td height="50" align="left"><strong>产 品 型 号：</strong> DDSY25型单相全电子式预付费电能表</td>
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            <td height="50" align="left"><strong>产 品 价 格：</strong> <span class="price">428.00</span> 元 </td>
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        <td align="left">&nbsp;&nbsp;<img src="images/arrow_01.jpg" width="10" height="9" /> 功能概述</td>
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        <td align="left">DDSY25型单相全电子式预付费电能表，采用专用集成电路进行电能计量、专用掩膜CPU电路进行数据处理、显示和控制继电器动作。其主要特点是性能可靠、准确度高、控制电流大、功耗低、体积小、重量轻和使用方便等。各项技术指标符合GB/T17215－2002、GB/T18450.3－2001中的规定。到目前为止，该型号产品已经在市场上销售9年。</td>
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        <td>&nbsp;</td>
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        <td align="left">&nbsp;&nbsp;<img src="images/arrow_01.jpg" width="10" height="9" /> 用途和使用范围</td>
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        <td>&nbsp;</td>
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        <td align="left">供计量额定频率为50Hz的交流单相有功电能。适用于预付费以及与计算机联网运行等。</td>
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        <td>&nbsp;</td>
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        <td align="left">&nbsp;&nbsp;<img src="images/arrow_01.jpg" width="10" height="9" /> 工作原理</td>
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        <td>&nbsp;</td>
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        <td align="left">电能表由两个主要功能块组成：1、电能计量部分。2、微处理器部分。电能计量部分使用单相电能测量专用集成电路；该电路产生与
用电量成比例的脉冲序列，然后送至微处理管理系统。IC卡上的电量数据通过IC卡导入装置直接送至微处理器管理系统，最后由CPU运
算后，提供状态显示和报警信号等。</td>
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        <td>&nbsp;</td>
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        <td align="left">&nbsp;&nbsp;<img src="images/arrow_01.jpg" width="10" height="9" /> 主要技术参数</td>
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        <td>&nbsp;</td>
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        <td align="left">额定电压：220V　额定频率：50Hz<br />
          额定电流：5(20)A　10(40)A<br />
          仪表常数：800imp/kW.h 1600imp/kW.h 3200imp/kW.h<br />
          环境温度：-25℃~+60℃<br />
          相对湿度：不大于85%<br />
          精确度等级：1.0级<br />
          具有防潜动逻辑电路<br />
          具有防窃电功能</td>
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    <td width="524" align="center">Copyright 2009 <a href="#">上海前进电子器材有限公司</a> All Rights Reserved 沪ICP备 88888888</td>
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